Photographic shutter.



Patented Dec. 26, I899;

M. F. JURUICK.

PHOTUGRAPHIC SHUTTER.

(Apphcatlon filed Nov 23, 1898 Model.)

.E S S M W V/NVENTOH m5 NORRIS PETERS co, PHOTOVLTHOY, wAsuwsrom u. c

UNITED STATES PATENT OFFICE.

MAXIMILLIAN F. JURUIOK, OF ORESSKILL, NElV JERSEY.

PHOTOGRAPHIC SHUTTER.

SPECIFICATION forming part of Letters IPatent No. 639,993, datedDecember 26, 1899.

Application filed NovemherZB, 1898. Serial No. 697,259. (Model.)

T ctZZ whom it may concern.-

Be it known that I, MAXIMILLIAN F. JU- RUIOK, a citizen of the UnitedStates, residing at Oresskill, county of Bergen, State of New Jersey,have invented certain new and useful Improvements in Camera-Shutters, ofwhich the following is a specification.

This invention relates to improvements in camera-shutters; and itsobject is to provide a shutter-operating mechanism of simple andefficient construction.

My invention has especial reference to the form of shutter mechanismwherein the ac tuating member in its movement in one direction performsall the operations of opening and closing the shutter, while inreturning or resetting said actuating member it is without action on theshutter; and my inven tion comprises means for rendering the engagementbetween the actuating member and the shutter mechanism effective ornon-effective according to the direction of movement of the former.

Other features of my invention relate to the construction of the shuttermechanism, whereby the assembling and adjustment of same are facilitatedand to the construction of the release and stop mechanism for theactuating member.

Referring to the accompanying drawings, which form a part of thisspecification, Figure 1 is a partly-broken front View of my im provedshutter. Fig. 2 is a front view of the same with the front portion ofthe casing removed, the operating-sprin g box being shown in section.Fig. 3 is a view similar to Fig. 1, with the cover-plate of therelease-lever removed and the operating member in its middle or shutteropening position. Fig; t is a sectional view looking from the rear ofthe shutter mechanism in the same position as in Fig. 3. Fig. 5 is adetail rear view of the release and stop leven' Fig. 6 is a sectionalview of the shutter mechanism, taken on the irregular line 6 6 in Fig.4c; and Fig. 7 is an enlarged horizontal section of the shuttermechanism, actuating member, and release and stop mechanism, showing theoperating member as being reset without actuating the shutter mechanism.

The shutter-casing is preferably composed of a rear plate A and a frontplate A, at tached together by screws or otherwise and provided with theusual lens attachments, forming the aperture b.

In the rear casing or back plate A are pivoted the shutters B B, whichare preferably supported on the back plate A by means of headless pinsor studs 1 2, projecting from said plate, passing freely through thepivotholes of said shutters and the shutters being held in place on saidpins by the operatinglever O, which is pivoted by pivot-screw c to astud c on the back plate A and extends over and in contact with theshutters. The use of special fastening-screws for the shutter is thusavoided, and when the lever O has been removed the shutters can at oncebe lifted off.

The lever C has slots 3 4:, which are traversed by the fixed pinsl 2 asthe lever swings on its pivot, and extensions 9 10 of these slots engagewith pins 7 8 on the shutters B B, so as to cause the shutters to turnto open or closed posit-ion as the lever O swings one way or the other.A slit 5 is formed in lever C, so as to leave a projecting stop-finger 0above said slit, such finger engaging with the rim 6/. of back plate A,and thus acting as a stop for lever (J.

Fastened to top of back plate A is a boxD, which contains and supportsthe actuating member or setting-lever E, which is pivoted therein at dand is provided with a handle 8. An actuating-spring F is secured at oneend to the member E and at the other end to pivotal stud (l of cap D,which is adjustable in the usual manner to adjust the tension of thespring. An arm E of memberE extends down into the shutter-casing and isprovided with a projection, pin, or stud 11, which engages with thelever O to operate the same. The lever O has a longitudinal slot 12formed therein, so as to leave a finger or arm 13 above said slit and onthe upper side of the lever, and on the end of this finger is aninclined or cam portion 14, which is adapted to engage with pin 11 onarm E as the latter passes in the direction of the arrow in Fig. at and,being inclined to the path of pin 11, to thereby cause the lever O to bedepressed and to open the shutters B B. The end 15 of arm E is adaptedto engage with a pin 16 on lever just after pin 11 leaves incline 14,and to thereby force the lever 0 back to its normal position, thusclosing the shutters by the power of the actuating-spring itself. Thesame actuating-spring thus successively acts to open and to close theshutters. To further this object, the end 15 of arm E is preferablycurved or inclined as shown. I also provide spring S, attached to leverO and engaging with the rim a of easing A, to impel the said lever tothe shutter-closing position; but this spring need not be of greaterstrength than is necessary to hold the shutters closed when theactuating memberis set or is being reset for action. In its returnmovement in resetting the pin 17 on arm E strikes the rear edge orshoulder 14 of the cam portion 14 of finger 13, which is capable ofresilient transverse movement or is elastically flexible in a directiontransverse to the motion of lever C and to the plane of said lever, andsaid pin 11 and rear edge of shoulder 14 of said cam portion are sobeveled or inclined that the pin 17 thereupon bends the finger 13 to oneside, as shown in Fig. 7, so as to allow said pin 11 to pass withoutdepression of lever C or opening of the shutters.

The lever O is preferably made of brass or similar malleable material,so that the amount to which the said lever is depressed, and thus thedegree of opening of the shutters B B, may be determined or adjusted bybending the finger 13 inwardly or outwardly, as required, this finger 13being thus adjustable in the direction of movement of the lever O. Thismay be effected by inserting a screwdriver between finger 13 and thecasing or in the slit 12, as the case may be, and then prying the fingerinto the desired position. In similar manner the stop 0 may be adjustedto limit or extend the closing movement of the shutters B B by insertinga screw-driver in slit or between said finger and rim Ct, as the casemay be, and prying the said stepfinger into proper position.

On the front side of arm E is a stud or detent 17, and a release andstop lever G, pivoted at g to the front side of front plate A, and isprovided with detents which extend through a slot 18 in the front plateA and engage with the detent 17 to control the release and stopping oflever C. One of these detents is in the form of a lug or projection 19on the lever G itself and engages with the detent 17 to hold the arm Ein the reset position. (Shown in Fig. 1.) The other detents are on anauxiliary lever I, pivoted at t' to lever G and having detent-fingers 2O21 formed thereon, and the other arm 22 of said lever I carries a pin23, (see Figs. 5 and 7,) which is snapped by the spring action of arm 22into one or the other of the holes 24 in lever G, thus holding the armg, the auxiliary stoplever I, and the release-lever G in the differentrelative positions to which they may be shifted and preventingaccidental displacement.

K is a lever which has a handle 7t and is pivoted at g to the frontplate A and engages by a slot with a pin 2" on the lever I, so as toshift said lever to bring either of the detents 2O 21 into the path ofdetent 17. A lever L, having handle Z, is pivoted to the front plate atZ and engages by a pivotal connection with the lever G, so as to enableoperation of said lever G by pressure on handle Z. The lever G isreturned to normal position by spring 25. A pneumatic operating devicefor lever G is shown consisting of the usual pneumatic cylinder 27,whose piston 28 engages with the end of lever G to ram same whenair-pressure is applied in such cylinder.

In order to enable easy access to and observation of the detentmechanism, the lever G may have an oblong slot 30, which is covered by acover plate 31, fastened removably thereto by screws. The lever G isalso provided with marks, as indicated,corresponding to the desired kindof exposure,as indicated by the pointed end of said lever registeringwith the marks I, B, or T, corresponding to instantaneous,bulb-instantaneous, and time exposures. The actuating member orsetting-lever is reset by moving the handle 6 to throw the arm E toposition shown in Fig. 1, where it is caught and held by detent 19,engaging with detent 17, as shown in Fig. 1. In this figure the lever Kis shown as placed in the instantaneous position, so that when therelease-lever G is raised by the lever L or the pneumatic device 27 28it does not bring either detent 20 or 21 into the path of detent 17, andthe arm E, released from de tent 19, is turned by the actuating-spring Fso that its pin 17 rides over the cam portion 14 of finger 13 on lever0, thus depressing said lever and opening the shutter, and then the saidpin passing off of said cam portion frees the lever C again, and the endof arm E then striking the pin 16 on said lever C throws that leverforcibly upward and closes the shutter, as indicated in Fig. 2. Inresetting the actuating member or setting-lever the pin 11 rides overthe beveled edge 14: at the rear side of cam portion 1 1-, and thusdeflects the arm or finger 13 laterally without depressing same oraffecting the main body of lever C or the shutters B I3, which aremeanwhile held stationary by spring 17.

If the lever K be placed in the middle on B position the upper detent isbrought into the path of detent 17 when lever G is raised, so that thearm E is arrested midway of its course and the lever O is therefore helddepressed, holding the shutters B B open until lever G is released,whereupon the arm E is freed and allowed to complete its movement andclose the shutters.

In Fig. 3 the lever K is shown as placed in time position, so that whenthe lever G is raised the lower detent 21 arrests the detent 17 and armE, as shown, and thus holds the lever C depressed, as shown in Fig. 4.Then when lever G is released the lower detent 21 drops away from detent17, but detent 20 is at the same time brought down into its path, sothat the arm E is only permitted to move a slight distance and theshutters remain open. To terminate the exposure, the lever G is raisedagain, whereupon the detent 20 rises out of the way of detent 17 and thearm E is allowed to proceed and cause the shutters to close.

Having thus described my invention, the following is what I claim as newtherein and desire to secure by Letters Patent:

1. In a camera-shutter mechanism, the combination of a shutter-operating lever having a finger supported so as to move therewith,but which is elastically flexible in a direction transverse to the planeof motion of the opcrating-lever, and an actuating-lever engaging withthe said finger to move it bodily with the shutter-operating lever, ortransversely to the said lever, according to the movement of the saidactuating-lever.

2. In a camera-shutter mechanism, the combination with the actuatingdevice, of a shutter-operating lever having a finger movable therewithbut resiliently flexible transversely thereto, and having an upper edgeportion inclined to the path of the actuating device so as to cause thefinger and shutter-operating lever to be depressed by movement of theactuating device in one direction, and said finger having a shoulder inthe rear of said inclined upper edge portion with which the actuatingdevice engages in its movement in the other direction to cause lateralmovement of the finger without moving the shutter-operating lever.

3. In a camera-shutter mechanism, the combination with theactuating-lever carrying an actuating-pin with an inclined end, of ashutter-operating lever having a finger attached thereto and movabletherewith but resiliently flexible transversely thereto, said fingerhaving an upper edge portion inclined to the path of the actuating-pinand engaged thereby in one direction of movement of the pin to causedepression of the finger and shutter operating lever, and said fingerhaving a shoulder in the rear of said inclined upper edge portion, withwhich the inclined end of the actuating-pin engages to cause lateralmovement of the finger without moving the shutter-operating lever.

4. In a camera-shu tter mechanism, the combination with theactuating-lever carrying an actuating-pin, of a shutter-operating leverhaving a finger attached thereto and movable therewith,but resilientlyflexible transversely thereto, said finger having an edge portion toengage with the actuating-pin in its movement in one direction to causedepression of the finger and the shutter-operating lever, and saidfinger having a laterally-inclined shoulder in the rear of said edgeportion to engage with the actuatingpin' in its reverse movement tocause lateral movement of the finger without actuating theshutter-operating lever.

5. In a camera-shutter mechanism, the combination with thefreely-movable shutter, of a lever moving said shutter positively inopposite directions, and an actuating device, which imparts movementpositively in opposite direction bya continued movement of the actuatingdevice in one direction.

6. In a camera-shutter mechanism, the combination with the shutter, of ashutter-operating lever, an actuating-spring and an actuating-leverconnected to the actuating-spring and in its movement under the actionof said spring engaging with the shutter-operating lever to move samesuccessively in reverse directions by the direct action of said springto open and close the shutter.

'7. In a camerashutter, the combination with the actuating-lever and itsactuatingspring, of a shutter-operating lever having a spring tending tohold it in shutter-closing position, and provided with a cam portionengaging with the actuating-lever to cause depression and subsequentrelease of the shutter-operating lever, and means on the saidshutter-operating lever, for engaging with the actuating-leversubsequent to such re-' lease to enable the actuating-spring, throughthe actuating-lever, to force the shutter-operating lever to closedposition.

8. In a camera-shuttermechanism,the combination with theshutter-operating lever having a cam part and a pin, of anactuatingspring and an actuating lever connected thereto and having anactuating-pin engaging with the cam part of the shutter-operating leverto move the latter to shutter-opening position, and said actuating-leverhaving a portion engaging with the pin on the shutteroperating lever tomove same to shutter-010s ing position, after the actuating-pin passesout of contact with the aforesaid cam part.

9. In a camera-shutter mechanism,the combination with the shutters andthe shutteroperating mechanism, and a casing containing same and havinga slot, of a release-lever located outside of and in front of thecasing, and an auxiliary stop-lever pivoted to said release-lever andalso located outside of said casing, the release and stop detents onsaid levers projecting through the slot in said oasing, and anactuating-lever supported on said casing and having an arm extendingwithin said casing and engaging with the shutter mechanism, and havingapart extending through said slot and engaging with said release andstop lever.

10. In a camera-shutter mechanism,the combination of a casing having aslot, a shutteroperating mechanism located within said casing and havingan actuating part, a releaselever pivoted in the outside of said casing,an auxiliarystopdever pivoted to said releaselever and also locatedoutside and infront of the casing and engaging with said actuating partof the shutter-operating mechanism, and a shifting lever also pivotedoutside of the casing and connected to the auxiliary stoplever to adjustits position.

11. In a camera-shutter, the combination with the release-lever, of anauxiliary stoplever pivoted thereto and having a plurality of stops of ashifting lever pivoted concentrically with the release-lever andconnected with the auxiliary stop-lever, and means on said shiftinglever and said release-lever for indicating their relative adjustment.

